The number of customers who enter a bank is thought to be Poisson distributed with a mean equal to ...

The number of customers who enter a bank is thought to be Poisson distributed with a mean equal to 10 per hour. What are the chances that no customers will arrive in a 15-minute period?

A) Approximately zero
B) 0.0067
C) 0.0821
D) 0.0250

Q. 2

Which of the following will be helpful if the decision maker wishes to reduce the chance of making a Type II error?

A) Increase the level of significance at which the hypothesis test is conducted.
B) Increase the sample size.
C) Both A and B will work.
D) Neither A nor B will be effective.

Q. 3

The number of visible defects on a product container is thought to be Poisson distributed with a mean equal to 3.5. Based on this, how many defects should be expected if 3 containers are inspected?

A) 10.5
B) Approximately 3.24
C) Between 4 and 7
D) 3.5

Q. 4

The power of a test is measured by its capability of:

A) rejecting a null hypothesis that is true.
B) not rejecting a null hypothesis that is true.
C) rejecting a null hypothesis that is false.
D) not rejecting a null hypothesis that is false.

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The number of customers who enter a bank is thought to be Poisson distributed with a mean equal to ...

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